diff options
| author | Mikulas Patocka <mpatocka@redhat.com> | 2018-07-25 15:41:55 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-09 20:04:36 +0200 |
| commit | 3130702ac3a6c71a1196dfa0560d6ec9e54bf7aa (patch) | |
| tree | 43268c36e411cf93bfa1a243d353d1b4e920bd95 /fs | |
| parent | c602af2b76af159cc3ad0828d247484f99b4945c (diff) | |
udlfb: set optimal write delay
commit bb24153a3f13dd0dbc1f8055ad97fe346d598f66 upstream.
The default delay 5 jiffies is too much when the kernel is compiled with
HZ=100 - it results in jumpy cursor in Xwindow.
In order to find out the optimal delay, I benchmarked the driver on
1280x720x30fps video. I found out that with HZ=1000, 10ms is acceptable,
but with HZ=250 or HZ=300, we need 4ms, so that the video is played
without any frame skips.
This patch changes the delay to this value.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions